class A
{
    public void show( )	{ show2(); }
    public void show2( )	{System.out.println("外包");	}
}
class B extends A
{
    public void show2( )	{System.out.println("班级");}
}
class C extends B
{
    public void show( ) {	super.show();}
    public void show2( )	{System.out.println("超级棒");}
}
public class Test {
    public static void main(String[] args)
    { A  a = new B( );	a.show();	 B b = new C( );
        b.show( );	}
}
